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http://dx.doi.org/10.4283/JKMS.2013.23.6.193

Regional Distribution of Isotropy Magnetic Property of Dual-type Giant Magnetoresistance-Spin Valve Multilayer  

Khajidmaa, Purevdorj (Department of Oriental Biomedical Engineering, Sangji University)
Lee, Sang-Suk (Department of Oriental Biomedical Engineering, Sangji University)
Publication Information
Journal of the Korean Magnetics Society / v.23, no.6, 2013 , pp. 193-199 More about this Journal
Abstract
The regional distribution of magnetic isotropy depending on the post annealing condition for the dual-type structure GMR-SV (giant magnetoresistance-spin valve) of NiFe/Cu/NiFe/IrMn/NiFe/Cu/NiFe multilayer was investigated. The rotation of in-plane ferromagnetic layer induced by controlment of the post annealing temperature inside of the vacuum chamber. The magnetoresistive curves of a dual-type IrMn based GMR-SV depending on the direction of the magnetization easy axis of the free layer and the pinned layer are measured by between $0^{\circ}$ and $360^{\circ}$ angles for the applied fields. The optimum annealing temperature having a steady and isotropy magnetic sensitivity of 1.52 %/Oe was $107^{\circ}C$ in the rotational section of $0{\sim}90^{\circ}$. By investigating the switching process of magnetization for an arbitrary measuring direction, the in-plane orthogonal magnetization for the dual-type GMR-SV multilayer can be used by a high sensitive biosensor for detection of magnetized micro-beads.
Keywords
dual-type structure; giant magnetoresistance-spin valve (GMR-SV) thin film; magnetization easy axis; magnetoresistance curve; post annealing treatment; isotropy magnetic property; magnetic sensitivity;
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Times Cited By KSCI : 8  (Citation Analysis)
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